Use unit rates to determine the better buy and provide the unit price for your answer. Round your answer to the nearest hundredth, if necessary.$2.84 for 200 index cards$0.66 for 25 index cards

1. $ 2.84 for 200 index card :
per index card = $2.84 /200
per index card = 0.0142
≈$0.01
2.$0.66 for 25 index cards :
per index card = $0.66/25
per index card = 0.0264
≈$0.03